We would investigate the treatment characteristics of Ni rinse wastewater with the operating style (as such bach, semi-batch and continuous) and condition using electrodialysis apparatus. The limiting current density increased with flow rate and was constant. The limiting current density increased with Ni concentration and decreased with increasing treatment time. If a operating current density was low with increasing a flow rate, then a efficiency of current usage could be increased. In the case of a continuous system, as operating at a operating current density lower than a limiting current density, a current efficiency could be increased with a treatment time. The removal ratio of Ni in a rinse wastewater increased rapidly until 98 % but was constant 90 % after 40 minutes.